2. Specification
Table 1.
Average power consumption
Relative level measurement error over the entire
range
Frequency output: maximum frequency range
Frequency output discreteness
Frequency output pull-up to the power supply
Frequency output current limitation
9600, 19200, 38400, 57600, 115200
baud, 8n1
Mounting kit cable length
Housing Ingress Protection
2.1 Power supply
FLS is designed to work in the on-board power with a nominal voltage of 12 or 24
volts, has a reverse-polarity protection, over-voltage protection and a self-repairing fuse. A
wide range of operating voltage allows the sensor to work stably even in abnormal situations
- when the voltage is low up to 8 V or raised above the norm up to 55 V.
If the supply voltage exceeds 55 V, a protective diode and a self-repairing fuse in the
FLS circuit is triggered, and the sensor power is turned off. After reducing the supply voltage
level to the operating (normal) range, the sensor restores its operability.
2.2 Frequency output
The sensor`s frequency output is designed to transmit the data in a discrete signal
form of variable frequency and a 50% duty cycle. The positive signal potential is provided by
a pull-up to the sensor supply via resistor. The negative potential is formed by a transistor,
operating in a common-emitter circuit. The frequency output maximum current is limited to
100 mA. When the maximum current limit is exceeded, the high-speed protection is
triggered and deactivates the output. When the current is reduced to an acceptable value,
the frequency output continues to function.
The lower value of the output frequency is 30 Hz. The upper value is set
programmatically in the range of 500-2048 Hz.
If an error occurs, the sensor sets the frequency corresponding to the error code (see
Table 2). The error is also duplicated over the digital protocol.
Table 2.
